Six strangers who are all being blackmailed are summoned to a remote mansion run by a bizarre butler, to meet the man who knows their secrets. When the blackmailer subsequently turns up dead, the guests must uncover which of them is the guilty party - or if someone else is in the house. Comedy, based on the board game Cluedo, starring Tim Curry, Madeline Kahn, Christopher Lloyd, Lesley Ann Warren and Michael McKean